String life differences between Head Prestige (18x20) and Prestige Pro (16x19)

I currently have Flexpoint and might switch to IG or Youtek Pro.
I have enjoyed long string life of Prestige(18x20).
That particularly worked well for 15L gauge Babolat natural gut (which
maintains playabilty pretty long time).

Now I consider switching to Prestige Pro but has 16x19 string bed.
I'm just curious about how much difference there will be in terms of
string life in general(gut, poly or anything). Any tips will be appreciated.